Hi Daniel, PrimeFaces has the dynamic columns features for <p:dataTable> Maybe you can have a look at that option to have a variable number of columns.
regards Rudy -- Rudy De Busscher http://www.c4j.be On 17 January 2012 09:52, Daniel Reznick <vedm...@gmail.com> wrote: > Here the code snippet > > 'from time to time' : i mean that when user clicks some radio button i re > render the <h:panelGroup id="expenses_table_wrapper"> that holds the table > , even when i dont specify the column ids explicitly and let the JSF do > that, i still get the same "duplicate id exception" > > <h:panelGroup id="expenses_table_wrapper"> > > <h:form prependId="false" id="expenses_form"> > > <p:dataTable id="expenses_table" > value="#{expensesPage.expensesList}" var="expense" > rendered="#{not empty expensesPage.expensesList}"> > > <c:forEach items="#{expensesPage.unitsOfTime}" > var="unitOfTime"> > <p:column > > id="expenses_table_device_column#{expensesPage.fixStatisticsDateDate(unitOfTime)}" > > sortBy="SomeValue"> > > <f:facet name="header"> > <h:outputText value="#{unitOfTime}"/> > </f:facet> > > <h:outputText value="SomeValue"/> > > </p:column> > </c:forEach> > > </p:dataTable> > </h:form> > > </h:panelGroup> > > On Tue, Jan 17, 2012 at 10:31 AM, Milo van der Zee <m...@vanderzee.org > >wrote: > > > Hello Daniel, > > > > some code snippets could be helpfull. > > What do you mean by 'from time to time'? Doe you use an ajax library to > > rerender the table or do you mean by complete page render? > > > > Do you need the id's on the columns? Can't you just let JSF assign id's? > > > > I know that c: tags work problamatic with the view tree because they are > > not an element in that tree. Often using ui:repeat works better. > > > > I don't know what is changed between 2.0.8 and 2.0.11. Might be that > > they now follow the specs better... > > > > MAG, > > Milo van der Zee > > > > > > On Tue, 2012-01-17 at 08:37 +0200, Daniel Reznick wrote: > > > Hi > > > > > > Till now I was creating dynamic columns inside a dataTable using the > > > c:forEach , I was assigning unique Ids to each column and from time to > > time > > > was re-creating the table with different columns with no problem at all > > > > > > I was using the myfaces-api-2.0.5, myfaces-bundle-2.0.5 and the > > > myfaces-impl-2.0.5 jars , yesterday I switched to 2.0.11 , and the > > > c:forEach started to throw me errors , "java.lang.IllegalStateException > > > component with duplicate id" > > > and the id that was displayed was the id of the first column, so I > guess > > > for some reason it tries to create the same columns again and again and > > > still remembers the old columns, > > > > > > so after seeing this error I downgraded to 2.0.8 , and the error was > > gone, > > > so... Some thing went WRONG between 2.0.8 and 2.0.11, > > > > > > what could it be? > > > > > > How can I solve this issue , cause I need to use 2.0.11 version, > > > > > > > > > Help will be very appreciated, > > > > > > > > > Regards, > > > > > > Daniel. > > > > > > >
